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Table 6 Mean ± mean standard error of parameters obtained from fitting of TGK2 for direct current treated female groups

From: Efficacy of direct current generated by multiple-electrode arrays on F3II mammary carcinoma: experiment and mathematical modeling

ParametersExperimental groups
TG1-FTG2-FTG3-FTG4-FTG5-FTG6-F
i0 (mA)1.561 ± 0.0574.061 ± 0.2381.413 ± 0.0481.569 ± 0.0624.415 ± 0.2996.942 ± 0.485
i/i01.3331.4771.4151.2751.3591.440
γ (days−1)17.742 ± 6.76912.890 ± 4.37926.291 ± 11.32136.567 ± 8.08849.672 ± 18.22713.672 ± 5.227
ei0 (days−1)0.016 ± 0.000*0.043 ± 0.0040.054 ± 0.000**0.093 ± 0.000***0.021 ± 0.0060.034 ± 0.003
eγ (days−1)0.056 ± 0.0020.004 ± 0.000+0.921 ± 0.0830.015 ± 0.0040.023 ± 0.0050.007 ± 0.000++
SSE (cm3)0.115 ± 0.0520.068 ± 0.0240.522 ± 0.2680.392 ± 0.1300.226 ± 0.0810.226 ± 0.081
SE (cm3)0.040 ± 0.0130.036 ± 0.0090.082 ± 0.0340.087 ± 0.0170.068 ± 0.0100.068 ± 0.010
RMSE (cm3)0.039 ± 0.0130.034 ± 0.0080.080 ± 0.0330.084 ± 0.0170.065 ± 0.0100.065 ± 0.010
PRESS (cm3)0.017 ± 0.0130.014 ± 0.0070.103 ± 0.0720.098 ± 0.0480.021 ± 0.0080.021 ± 0.008
MPRESS (cm3)0.017 ± 0.0130.013 ± 0.0070.104 ± 0.0720.098 ± 0.0490.020 ± 0.0070.020 ± 0.007
\(r_{a}^{2}\)0.997 ± 0.0010.989 ± 0.0060.996 ± 0.0020.991 ± 0.0040.994 ± 0.0020.994 ± 0.002
Dmax (cm3)0.085 ± 0.0320.065 ± 0.0150.182 ± 0.0680.175 ± 0.0300.158 ± 0.0430.158 ± 0.043
  1. *0.016 ± 0.0001, **0.054 ± 0.0005, ***0.093 ± 0.0002, +0.004 ± 0.0001 and ++0.007 ± 0.0006. TGK2 was the second part of the direct current perturbed F3II tumor growth kinetic. The variable i0 was the polarization current and ei0 its estimation error. The variable γ was the exponential decay ratio and eγ its estimation error. The maximum distance, root means square error, sum of squares of errors, standard error of the estimate, adjusted goodness-of-fit coefficient of multiple determination, predicted residual error sum of squares and multiple predicted residual sum error of squares were identified by parameters Dmax, RMSE, SSE, SE, \(r_{a}^{2}\), PRESS and MPRESS (for m = 3), respectively. Legends of TG1-F, TG2-F, TG3-F, TG4-F, TG5-F and TG6-F were defined in Experiment subsection